A few of them are:
??? Modeling.challenges: In which way can Semantic Web systems be modeled so that
a broad user base will be able to understand and utilize these technologies? We make
an early attempt to answer this question in the last major part of this chapter.
??? Cost.challenges: Who is going to pay for the resources being used in distributed agent
networks? It is safe to assume that such agent services will be a lot more cost-intensive
than the ???simple Web information platforms of today??? (e.g., Web servers).
??? Pricing.challenges: Already now there is a tendency to commercialize high-quality
services. How will future information systems be rated in terms of usage fees if the
component services of some complex service (e.g., the logistics service, the currency
conversion service, and the mapping service for a complex online order service) each
incur fees, but the user of the complex service might not necessarily add to the income
of the complex service provider (e.g., because the user decides against buying
something after getting the shipment information)?
??? Business.challenges: What are viable business models for Semantic Web agencies
and services?
??? Quality.challenges: How will services be able to guarantee a certain level of quality
if they rely on the data collected in the Semantic Web, an information storage that will
be as inaccurate as the currently-available World Wide Web (mostly because everyone
will be able to put up whatever he or she deems correct and appropriate)?
??? Trust.
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